memory seats

Hello all..I'm new to this forum..I have a NEW TO ME, 2004 Silverado, Z71 ext.cab....I really like this truck so far, but I got a 2006 manual with the truck...I'm confused about the Memory Seat Option..My book shows 2 buttons on the drivers door. I don't have the buttons and am wondering if i'm missing something, or if I don't have the Memory Seat Option...I do have remote openers numbered 1 and 2,and the Driver Info.Center on the steering wheel.. Any help would be appreciated...Thanks in advance...
Steve.